Efficient electro-optical modulator based on thin-film lithium niobate and method

• Main Authors: GUO QUANBING, CHEN QI, XU HONGXING
• Format: Patent
• Language: Chinese; English
• Published: 12.03.2024
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

The invention discloses a high-efficiency electro-optical modulator based on thin-film lithium niobate. The high-efficiency electro-optical modulator comprises a light wave input end; the first Mach-Zehnder electro-optical modulator comprises a first light splitting coupler, a first ground electrode, a first signal electrode and a second ground electrode, the first ground electrode, the first signal electrode and the second ground electrode are arranged from top to bottom, the electrodes of the first output coupler are comb-shaped electrodes, comb-shaped teeth of the adjacent comb-shaped electrodes are oppositely arranged, and optical waveguides made of thin-film lithium niobate penetrate through the comb-shaped teeth of the adjacent comb-shaped electrodes respectively; two ends of the two optical waveguides are respectively connected with the first light splitting coupler and the first output coupler; when light waves enter the optical waveguides between the adjacent comb electrodes through the light wave in